Recurrent, lower-right-side pain. a dull, tight feeling.had several blood tst, a ct scan, and ultrasound with no explanation.i get hives sometimes. could this be my liver? would the test miss that?

Not the liver: Unlikely to be liver discomfort that low. Ct scan, u/s and lab usually show cause. Can be ovarian related pain. Can be due to scar tissue - adhesions- if past infection in abdomen. Occ surgeon needs a direct look with scope to find the cause (laparoscopy). Intestinal spasm is the most common cause when all the other tests come up negative- irritable bowel syndrome, food intolerances/allergies.